From 2cab7229fc3bdfb13035a5aa795af17c29436f13 Mon Sep 17 00:00:00 2001

From: Ilya Kurdyukov <jpegqs@gmail.com>

Date: Thu, 10 Jun 2021 14:15:07 +0700

Subject: [PATCH] benchmark-1.5.2 e2k support

---

 include/benchmark/benchmark.h | 7 +++++++

 src/cycleclock.h              | 6 ++++++

 2 files changed, 13 insertions(+)

diff --git a/include/benchmark/benchmark.h b/include/benchmark/benchmark.h

index 01f1262..ac344f4 100644

--- a/include/benchmark/benchmark.h

+++ b/include/benchmark/benchmark.h

@@ -310,6 +310,12 @@ BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();

 // intended to add little to no overhead.

 // See: https://youtu.be/nXaxk27zwlk?t=2441

 #ifndef BENCHMARK_HAS_NO_INLINE_ASSEMBLY

+#ifdef __e2k__

+template <class Tp>

+inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {

+  asm volatile("" : : "r"(&reinterpret_cast<char const volatile&>(value)) : "memory");

+}

+#else

 template <class Tp>

 inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {

   asm volatile("" : : "r,m"(value) : "memory");

@@ -323,6 +329,7 @@ inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp& value) {

   asm volatile("" : "+m,r"(value) : : "memory");

 #endif

 }

+#endif

 // Force the compiler to flush pending writes to global memory. Acts as an

 // effective read/write barrier

diff --git a/src/cycleclock.h b/src/cycleclock.h

index 179c67c..14c212b 100644

--- a/src/cycleclock.h

+++ b/src/cycleclock.h

@@ -41,6 +41,10 @@ extern "C" uint64_t __rdtsc();

 #pragma intrinsic(__rdtsc)

 #endif

+#ifdef __e2k__

+#include <x86intrin.h>

+#endif

+

 #if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)

 #include <sys/time.h>

 #include <time.h>

@@ -116,6 +120,8 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() {

   _asm rdtsc

 #elif defined(COMPILER_MSVC)

   return __rdtsc();

+#elif defined(__e2k__)

+  return __rdtsc();

 #elif defined(BENCHMARK_OS_NACL)

   // Native Client validator on x86/x86-64 allows RDTSC instructions,

   // and this case is handled above. Native Client validator on ARM

-- 

2.17.1